Push-button switch.



e. B. THOMAS. PUSH BUTTON SWITCH. APPLICATION FILED JULY 14, 1913.

v the construction which 1 will now describe' Warren stamens Parana? curable.

ononen B. THOMAS, or BisIDGEPORT, couunorrcur, assreuon TO THE rnmcms ELECTRIC SWITCH MANUFACTURING COMPANY, or nnmenron'r, oouunomour,

A CORPORATION OF CONNECTICUT.

PUSH-Burrow SWITCH.

Specification of Letters IE'a-tent.

Application filed July 14., 1913. Serial No. 778,987.

Patented July Y, 19141.

To all whom it may concern:

Be it known thatLGEoRcE B. THOMAS, a citizen ofthe United States of America, and resident of the city of Bridgeport, in the county of Fairiield and State of Connecticut, have invented a certain new and useful Improved Push-Button' Switch, of which the following is a specification. I

The object of my invention is to construct a simple and inexpensive form of push'button switcln'which-atthe same time will be efiicient in its action. This object I attain by In the accompanying drawing Figure 1 is a vertical section of my improvedswitch, showing the circuit open; Fig. 2 is similar view showing the moving'parts in' other positions, with the circuit closed; F ig, 3 is a I cross-section on the line 3+3, Fig. 1; Fig. 4:

is a cross-sectionon the line 4-.4, Fig.1; Fig. 5 isa' sectional plan on the line 5-5 Fig. 1; Fig.6 isa section on the line 6-6, Fig. 1; Fig. 7 is a perspective view of parts detached.

The frame A on which the switch mecha-' nisin is mounted preferably consists of sheet metal bent into ll-form at its upper part (Figs. 3 and t), and with one of the legs of the U extended and bent into a foot piece a.

To the bend of the U at the top' is secured the face plate F while at the foot piece is secured the insulating bottom plate 13. Be tween the face plate and bottom plate is held the rectangular casing C, forming with those two plates the inclosing box for the switcln Between the twolegs of the U of the frame .A 'is ,moun'ted the switch lever 10 by means of a pivot pin 11, the metal of the legs being dented .inwardlyaround this pivot pin to form small bearing faces 12 (Fig. l) for the lever, thus avoiding the employment of the usual separate washers.

The lever 10 haspivotally' connected to j.

it the stems of the push buttons P, P, and

one end of the lever is extended outwardly to carry the usual cross contact piece 13, insulated from the lever. On the insulating bottom plate are mounted two flexible eonnection of the circuit wires.

taets 14 and 15 with terminal plates having binding screws 16 on the. outside for con- VVhen the lever 10 is turned to the position shown in Fig. 2, the insulated contact piece 13 entersbetween the two contacts 14: and l5.and closes the circuit. the position shown in Fig. 1, thecircuit is broken.

To give. the requisite quick movement of the lever 10 in opening and inclosing the circuit, I form on the underside of the ever a projecting arm 17, which bears upon the When the lever 10 is moved to' upper end of a rod 19, preferably by forming a jaw 18 in the arm 17 to receive the bearing end of the rod, while at the same time the rod itself is made with jaws 20, as

I seen in Figs. 4- and 7, to embrace the arm l7. These jaws 20 also cooperate-with stops 21 on theframe A, which is notched out, as

seen in Figs. 1 and 2, to provide the stops, to limit the extent of throw of the upper end of the rod 19 and thereby the extent of throw of the switch lever. This rod 19 is shouldered at 22, Fig. 7, to bear through a washer 23 upon a coiled spring 25 around. the stem of the rod and hearing at its lower end upon the foot piece a of the frame A; The lower end-of the rod 19 projects freely through an opening in this foot p ece, as seen in Fig. l,

forming a fulcrum point on which the rod and spring may swing from the position shown in Fig. l to that shown in Fig. 2', or vice versa. v

It will be seen that the actionof the arm 17 and rod 19 is that of aknuckle joint, the" coiled spring 25 pressing the rod 19 against the arm and tending to keep the parts in either position of rest, Figs. 1 and 2, but giving a quick impulseto the second half of the movement after the knuckle joint passes the dead center in either direction.

I claim as my invention:

1. In apush button switch, a frame and a switch lever pivoted thereon, said switch lever having a jawed arm in combination with a rod having a awed end to cooperate with said arm and a coiled spring on said rod and pressing the latter against the arm.

2. In apush button switch, a frame and In testimony whereof I have signed my a switch lever pivoted thereon, said switch name to this specification, in the presence having an arm in combination With a rod of two subscribin Witnesses. having a jawed end to cooperate with said EORGE B. THOMAS. 5 arm, stops on the frame to cooperate with Witnesses: jaws on the rod, and a coiled spring to act G. W. GOODRIDGE,

upon the rod. H. M.- WICHERT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0'. 

